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Issue 40, 2013
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Hybrid chalcogenide nanoparticles: 2D-WS2 nanocrystals inside nested WS2 fullerenes

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Abstract

The MOCVD assisted formation of nested WS2 inorganic fullerenes (IF-WS2) was performed by enhancing surface diffusion with iodine, and fullerene growth was monitored by taking TEM snapshots of intermediate products. The internal structure of the core–shell nanoparticles was studied using scanning electron microscopy (SEM) after cross-cutting with a focused ion beam (FIB). Lamellar reaction intermediates were found occluded in the fullerene particles. In contrast to carbon fullerenes, layered metal chalcogenides prefer the formation of planar, plate-like structures where the dangling bonds at the edges are stabilized by excess S atoms. The effects of the reaction and annealing temperatures on the composition and morphology of the final product were investigated, and the strength of the WS2 shell was measured by intermittent contact-mode AFM. The encapsulated lamellar structures inside the hollow spheres may lead to enhanced tribological activities.

Graphical abstract: Hybrid chalcogenide nanoparticles: 2D-WS2 nanocrystals inside nested WS2 fullerenes

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Publication details

The article was received on 09 Jun 2013, accepted on 01 Aug 2013 and first published on 01 Aug 2013


Article type: Paper
DOI: 10.1039/C3DT51537K
Citation: Dalton Trans., 2013,42, 14568-14575
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    Hybrid chalcogenide nanoparticles: 2D-WS2 nanocrystals inside nested WS2 fullerenes

    F. Hoshyargar, T. P. Corrales, R. Branscheid, U. Kolb, M. Kappl, M. Panthöfer and W. Tremel, Dalton Trans., 2013, 42, 14568
    DOI: 10.1039/C3DT51537K

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